76 TRUNCATELLINA. 



T. collier atis has not been figured. It was described before 

 rivierana, and if Westerlund is right in thinking them forms 

 of one species, the latter would take varietal rank. Yet until 

 there can be a revision of the Swiss forms also, any rearrange- 

 ment of the nomenclature would be futile. 



Pupa muscorum var. abanensis De Gregorio (pi. 11, fig. 9). 

 Shell most minute, pupiform, yellowish, subcylindric ; whorls 

 4, convex, slowly increasing, penult scarcely wider than the 

 last. Aperture erect, slightly margined ; outer lip compressed 

 in the middle ; columellar lip with one fold. Length 2 mm. 



Italy : Abano, in mud of ponds from the thermal springs. 



Pupa muscorum L. var. abanensis DE GREG., Ann. de Geol. 

 et Pal., 32 livr., 1907, p. 7, pi. 1, f. 16. 



"P. muscorum" is understood in the sense of Draparnaud. 

 According to De Gregorio it differs from Vert, dinn De Stef. 

 by the less cylindric shape and the compressed outer lip. 

 Probably Recent or Pleistocene. 



Var. ortonensis De Greg. (pi. 11, fig. 8). ''Among the 

 species from Monte Ortone [mud from thermal springs] I 

 have one example which appears identical, but it has the outer 

 lip provided with two teeth, the anterior lip with another 

 tooth and one columellar tooth" (Pupa muscorum var. orto- 

 nensis De Gregorio, op. cit., pp. 7, 16, pi. 1, f. 29). 



Scarcely a Truncatellina, if the description of teeth is cor- 

 rect; possibly a Vertigo; yet what can be done with such 

 drivel as this paper? One hesitates between amusement and 

 pity. 



Pupa baitagliensis De Greg. (pi. 11, fig. 7). Shell very 

 minute, subcylindric, elegant, slowly increasing, ornamented 

 with filiform riblets of growth, a little umbilicate. Whorls 

 slowly increasing, convex ; aperture subquadrangular, rounded, 

 narrow. Length, 1 mm. A very rare species of which I have 

 but one example. It appears to be of the type of P. uva L. 

 (De Gregorio). 



Italy : Battaglia, in mud from reservoir fed by hot springs 

 (72 to 90 Centigrade). 



